Friction door holder



Feb. '1e 1926. 31,573,404

N. B. HURD FRICTI ON DOOR HOLDER Filed July 15 1925 ATToR'NEY- Y Patented Feb. 16, 1926i.

UNITED [stares PATENT`OFF1CE.

NORMAN B. HURD, OF NEEV BRITAIN, CONNECTICUT, ASSIGNOR TO THE AMERICAN HARDWARE CORPORATION, OF NEVI BRITAIN, CONNECTICUT, A CORFORATION OF CONNECTICUT.

. v FRICTION DOOR HOLDER.

Application filed July 15, 1925. Serial No. 43,722.

. T all whom t may concern:

Be it known that I, NORMAN B. I-IURD, a citizen of the United States of America,

residing at New Britain, Connecticut, haveA invented a new and useful Friction Door Holder, of which the following is a speciication.

My invention relates to a friction door holder. i 1

It is an object ofthe invention to improve the construction of a friction door holder andl to provide one which will be serviceable in use and which can be manufactured relatively cheaply.

It is another object to provide a door holder which may be used without alteration or inverting for either a right or left' hand opening door. `Other objects will be apparent upon the reading of the following specication.

Briefly stated, in the preferred form of the invention, I employ two arms one to be lattached to a door easing and the other to `be attached to a door. If desired, a

i door closer may be used in connection with my improved door holder.` The two arms are pivotally connected together and a friction member is adapted to frictionally coaet with the arms for holding the door in position. W'hen the device is used for a right hand opening door, the friction member frictionally coacts with one arm while when the device is used on a left hand opening door, the friction member frictionally coacts with the other arm for holding the door in position. It is not necessary with my improved door holder to turn the same over or make any. changes when using the-same on a right or on a left hand opening door. The device may be readily and simply adjusted so as to hold the door .in any desired position within the range of adjustment. v

In the drawings which show, for illustrative purposes only, a preferred form of -the invention- Y Fig. 1 is a top plan view of a door holder applied and illustrating features of the invention;

50 Fig. 2 is an enlarged side view in partial section of the friction holder shown in Fig. v1

Fig. 3 is a bottom plan View of the device-shown in Fig. 2.

In the form shown, I employ two arms to a door casing or wall T, while the other may be pivotally secured to a door 8 or, if desired, to a door closer 9 thereon. The arms are provided with friction faces 10-11 for coaction with complementary friction faces on which I will term a friction block 12 interposed between the two arms. A pivot member, such as a bolt 13, pivotally connects the two arms together and holds the friction block 12 in place. The bolt 13 may be non-rotatably secured to one arm as by means of a square shoulder v 14 formed thereon and litting within a correspondingly shaped bore through the arm. A nut 15 may be threaded on one end of the bolt 18 so as to permit of some ad-` justment as will be later described. The

smooth bore in the other arm 5 and a nut 16 is threaded thereon. If desired, a lock washer 17 may be interposed between the nut 1G and the arm 5. The washer may have a lug or tongue 18 projecting from the bore therethrough, which lug is slidable in a keyway or groove 19 extending longitudinally of the bolt 18. This lock washer is for the purpose of causing the nut 1G to turn with the bolt so as to avoid the danger of having the nut 1G become accidentally loosened when the device is in use. Since the opposite end of the bolt is square as at 1&1, the nut 15 will also turn with the belt and with the arm 6. The intermediate portion 2O on the bolt 13 is screw-tln'eaded and the friction block 12 is provided with an internal thread fitting on the threaded portion 2O so that in rotating the -fri'ction block and bolt relatively to each other, the friction block will move longitudinally ofthe bolt in one direction or the other so as to frictionally coact with either the friction surface 10 on the arm 6 or with the friction surface 11 on the arm 5.

The friction block is connected to one or the other or to both of the arms. In the preferred form shown, the block is provided with an extension or arm 2l which may be slotted as indicated at 22. Links 23-211 may be pivotally connected to the arms 6 5 respectively as by means of pins or rivets 25-26 and the opposite ends of the links may be pivoted to each other by means of the pin or rivet 27 which lat- -ter may be slidable in the slot of 22 so as to cause the pivoted together ends of the linlrs to move the arm 21. The operation of the device isas follows:

With the arms connected, for example as shown in Fig. 1, when the door is closed, the friction bloclr 12 will bc spaced from say the lower friction face 11 on the arm and the arms will lie at small angle to each other,

- the arm 21 substantially bisecting` the angle between the two arms. Now, when the door is opened, the arms move. to an increasing` angle with each other and due to the link `Vand ythe door'will then be held in adjusted position. lf it is desired to hold the door in a wider open position, the nut 1S 1s backed off slightly so as to lpermit a further Vrota- 'l tion ofl the block 12 beforeit engages the friction face 11. Obviously by varying the position of the nut 16, the position at which the door is held open may be correspondingly varied.

As will be clear from the drawings, the arms 5-6 may be folded together as shown in Figs. 2 and 3 and, therefore, the arm 6, when loosened from the door could be rotated in a clockwise direction as viewed in Fig. 1, and rotated 180 degrees and during this rotation the block 12 and arm 21 thereon would be rotated in the same direction substantially 90 degrees. Obviously then with this possible movement the door holder may be used on either a right orleft hand open ing door. When used on a door opening opposite to that shownin Fing. 1, thefriction face 10 on the a 1mv G would he engaged by the. corresponding friction face on the block 12 and adjustment of the position at whichV the door is held open would be effected by screwing up on orbacling off lon the nut 15 in amanner similar to that heretofore described. Y A

It will therefore be seen that by my improved friction door holder, ll am enabled to hold open a door which opens right or left handed and this without turning the vholder upside down as required with some holders now on the market, and without making any substantial changes or adjustments other than perhaps adjusting the nut 15 or the nut 16 so as to hold the door in the desired po-sition. A very `accurate adjustmentmay be secured and the parts will be caused to operate positively and reliably and there are few parts to get out of order. The Y, door holder may be employed in connection with any( suitable form of door closer but l do not wish to be limited to such combined use since my door holder may be employed merely for holding open a door which is manually closed.

While the invention has been described in some detail, I do not wish to be limited to the form shown since changes may be made within the scope of the invention as shown in the appended claims.

l claim:

1. In a friction door'holder, a pair ofv arms having friction faces thereon, a friction block adapted to frictionally engage said faces, a bolt connecting` said arms and in screw threaded engagement with said friction block whereby when the bolt and friction blockl are relatively rotated in one direction, the block will contact with the friction face on one arm and, when rotated in the opposite direction, the block will contact with the friction face on the other of said arms, and meansfor causing,` said block to rotate at a different speed than said arms as the latter are swung to and fro.

2. ln the combination defined in claim 1 and means for connecting said block to the other of said arms whereby the movement ofv said block will be influenced by the relative movement of Said two arms.

3. In a friction door holder, a pair of arms having friction faces thereon, a friction block interposed between said arms and adaptedto frictionally engage said frictionv relatively to said arms for cau-sing the block to move on said bolt to engage one of said friction faces.

NORMAN B. HURD. 

